John desmond



Darren diaree Farrar 'Ottica JOHN DFSMOND, OF CLEVELAND, OHIO, ASSIGNOROF ONE-HALF TO I/VILLIAM R. GERHARD, OF SAME PLACE.

|NJECTOR.

l SPECIFICATION forming part of Letters Patent No. 330,964, datedNovember 24, 1885.

Application filed February 6,1885. Serial No. 155,083.

y useful Improvements in Injectors; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use the same.

My invention relates to improvements in,

injectors for steam-boilers, the object being to provide check -valvesfor the hotV Yand cold water overflow, that open outward and operateautomatically, being opened at first by the pressure of steam fromwithin, and are afterward closed by atmospheric pressure from without,to the end that with the exception of the stop-valve in the steam-pipethe injector in all its parts is made automatic.V

My invention also consists in the details of construction hereinafterdescribed.

In the accompanying drawings, Figure 1 is a side elevation, in section,of my improved injector. Fig. 2 is a plan view of the plug F andcross-barf.

A represents the body ofthe injector, that in crosssection isrectangular withronnded edges. At the ends are respectively the nozzlesB and C. To the former is attached a steam-pipe, B, leading from theboiler and provided with a stop-valve. To the latter is attached thefeed-water pipe C', leading` to the boiler and provided in the usualmanner with a check-valve. By the side of the nozzle Bis an openingsecured by the plug B2, by remov ing which access is had internally tothis part of the injector. On top is the nozzle D, secured by the plugD. This nozzle has lateral openings d, known as Coldwater relief oroveriiow.7 Below is the nozzle E, to which is secured the suction orcold-water pipe E', and an opening secured by the hollow plug F, theopening through the plug forming the hotwater relief or overflow j'.Internally are the longitudinal central walls, G and H, that join,respectively, the transverse diaphragme G and H and divide the injectorin the main into the ve chambers I, I', I2, I3, and I4, and thediaphragm g, extending from the wall G to the outer wall of theinjector, and between the diaphragm G', and has a bore, 7c, somewhat(Model.)

this diaphragm and the plug B2 is the small chamber t', and by means ofan opening, i', throughV the wall G this chamber is in open relation.with the chamber I. Through the wall H is an opening closed by thecheckvalve F', opening outward, the stem of which passes through a smallcross-bar, f', attached to the plug F, and formsa guidei'or the valve.This valve is balanced by the coil-spring f 2. From the inside of thenozzle D an opening 6o leads into the chamber I2, and is closed by thecheck-Valve d', opening outward, and thestem,

of the valve operates in the bore of the plug D, that serves as a guidefor the valve. A plug, J, screws -into an opening'in the dia- 65 phragmg, and has a small bore, j, the end of the bore terminating in thechamber i being slightly Haring and funnel-shaped. In line with the plugJis the plug K, that screws into 7o larger than the orifice j. Theadjacent ends of the plugs .Tand K are separated a short distance, andthe intervening space is about midway over the pipe E". A hollow plug,L,

is screwed into the diaphragm G between the chambers I and I2, Vtheendof the orifice presenting toward the chamber I being slightly flaring.In line with the plug L, and separated from it but a short distance, isa plug, M, screwed into an opening in the diaphragm H. The bore of thisplug is larger than the bore in the plug L,and is funnel-shaped at theend next the plug L.

N is a tube, with a bore of the same diameter as the cylindrical part ofthe bore in the plug M. This tube and plug almost come in contact, beingseparated perhaps one-hundredth part of an inch, more or less. The outerend of the tube nts i'n the nozzle C, and has a shoulder, n, that abutsagainst a corre spending shoulder in the nozzle, and is held in placefrom the outside by the coupling of the feed-pipe that abuts against theend ot' the tube.

In starting the injector by means of the valve in the steam-pipe a smallquantity of steam is first admitted, and is received first into thechamber I, and from thence a portion of the steam passes direct throughthe plug L to the chamber I2, and the balance roo of the steam passesthrough the orifice i and' through the plugs J and K to the chamber I2.Some of the steam also passes through plug M and tube N and into thefeed-pipe as iar as the check-valve therein, and a small portion of thesteam finds its way through the slight opening between the plug and tubeinto the chamber I3. The admission of steam expels the air from theinjector, forcing it out rst by opening the more accessible valve d, andafterward, as the pressure increases, by opening the valve F. rIheexpulsion of the air produces a partial vacuum in the injector, which,togethcr'with the action 'ofthesteam in passing from the plug J to theplug K across the mouth of the suction-pipe E', raises the water,whichis-carried by the current of steam through the plug K into the chamberI". The momentum of the water, and urged along perhaps more'or less bythev current of steam,l

Y carriesitth rough'the valve-d and out.through the overflow-openings d,and more or less conden-'ed hotV water finds its way through the openingbetweenthe tube and plug intothe chamber J3, Vand'is dischargedthroughthevalve F. The introduction of thewater causes a condensation' of steamthat.' produces apartial vacuum that results in the closing of thevalves dand F by! atmospheric pressure from without, the valve d,beingyin the immediate vicinity of where the greater' part' ofthelcondensatio'n' takes place, closing lfirst. The steam continuing' tolo'w' through' the steam-pi pe as the pressure! increases, a current yofvsteanlisy established through the plugs and tubes L, M,-

and "N, that'draws'the'water inwith it and forces'it 'along'-the'eed-pipe to the boiler.

In operating 'this 'injector therey is but the one Valve to manipulate,(the valve inthe steam-pipa) all* the other'parts operating lau--tornatically.

No skinv is required. nnforu'inary'workman can learn itn'afew minutes-to operate this Theinjector wilt-start lpromptly and with certainty,and will continue to act as long as the supply of steam and water isfurnished.

I am aware that a double injector is not new, and also that it is old toprovide an injector with two automatically operating reliefvalves; henceI make no claim, broadly, to

-ond passage-way parallel and in open relation at either end with thefirst passage-way, re-

lief-valves. opening outward and connected K with the first passage-way,and a suction-pipe connected with and at right angles to thev secondpassage-way, with the ports arranged substantially as described.

2. In an injectorfor steam-boilers, the com bination, with a direct`passage-way through the injectorg'vfrom'thesteampipe to the feed---pipe thereof, a second passage-way leading across the mouth of thesuction-pipe parallel andl in open relation withtheurst passageway,eachpassage-wayprovided with a succession vof` hollow plugs with spacesbetween,

arranged substantially as indicated, ofcoldv and hot water reliefs `oroverflows, each pro- `videdwith a valve opening outward, the for- 'merarranged above, lso t'hatwater will escapel therefrom-by, pressure fromwithin, and

`vthe latter arranged below,1so that water' will y-escape therefrom-by-gravity, substantially as shown. v

In testimony whereof I sign this'specifcation, inthepresence `of twowitnesses, this 30th daybfiJanuary, 1885.

JOHN DESM'OND.

/'Yitnesses:l l

HENRY GCRowELL, GSW. SHUMWAY.

